Alexander wilson



(No Model.)

A. WILSON. GOVERNOR FOR MARINE ENGINES.

No. 579,204. Patented Mar. 23, 1897.

ju emir gw WWW arena ALEXANDER XVILSON, OF HULL, ENGLAND. I

GOVERNQR FOR MARINE ENGINES.

SPECIFICATION forming part of Letters Patent No. 579,204, dated March23, 1897. Application filed February 10,1896. Serial No. 578,811. (Nomodel.) Patented in England July 16, 1894, No. 13,662.

To ctZZ whom it may concern:

Be it known that I, ALEXANDER WiLsoN,

marine engineer, a subject of the Queen of I which- Figure 1 showsvertical elevation of my improved apparatus for governing marine enginesto prevent them from racing. Fig. 2 is a vertical elevation of largecylinder. Fig. 3 is a plan of Figs. 1 and 2, showing small and largecylinders connected; and Fig. 4 shows driving-pulley H suitable toreceive either belt or rope.

For the purpose of my invention I provide two cylinders A and A ofdifferent areas. The small cylinder A is fitted with a small pistonvalve and rod Band three pipes, one the inlet-pipe O and twooutlet-pipes C, the inlet-pipe 0 being connected to the center of thesmall cylinder and to the condenser, the pipe being fitted with atap-valve or the like for the purpose of turning on or off to create ordestroy vacuum. The centerof the small cylinder is preferably open tothe condenser or induction-pipe. In this small cylinder, be tween thetwo ends of the piston-valve B, is an area for vacuum to impart motionto the second or large cylinder-piston D. This large cylinder isprovided with one or more springs, cushions, or the like B at each end.(See Fig.

' 3.) The aforesaid outlet-pipes are connected to the said largecylinder from each end of the small cylinder to each end of the largeeylinder for admission-passages and so deliver at each end and feed suchlarge cylinder and give motion to the piston D within it, thus actuatingthe throttle-valve, which is connected to such piston direct or bybell-cranks or any suitable means.

I employ a suitable framework E, having venient place.

suitable bearings F for carrying horizontal shaft G, upon which ismounted a suitable driving-pulley II, motion being imparted to thispulley by means of a belt, rope, or the like from the engine-shaft. Thesaid horizontal shaft G is provided with two disks J and K. The disk Jis permanently fixed to the shaft, and K is loose, but is connected tothe disk J by four sets of arms L, jointed in the center to four balls Ma set of two arms to each ball. To give freedom to the motion of suchballs M, a helical or the like spring 0 encircles the shaft G betweenthe said disks J and K. The said disk K has a groove K formed on itsperiphery to receive the forked or concave end B of the piston-rod B ofthe small cylinder A, by which means motion is imparted to the saidpiston-valve of small cylinder.

For the purpose of regulating the throw of the ballsI employ two rings Pand P, mounted on the horizontal shaft G, the said rings being connectedby two or more pins, screws, or the like Q, which pass through the fixeddisk J. The said rings therefore turn with the said disk J, the innerring P bears against the spring 0, and a fork R, having a threaded end Sworking in brackets T, bears against the outer ring P, a milled nut Ubeing fitted on the threaded part within the bracket for the purpose ofallowing the said fork R to be moved backward and forward on the shaft,thus compressing or allowing the spring to be extended, by which meansthe throw of the balls can be regulated.

The framework E of the apparatus is provided with feet for it to standupon, such feet having holes through them for allowing the apparatus tobe bolted to the floor or any con- The large cylinder may be providedwith feet also, for a like purpose, and it may be bolted to a bulkheador in any suitable position.

The driving-pulley of the apparatus may be made as shown at Fig. 4,having a surface for a strap or a groove to receive a rope, so

that it is applicable to engines driven by either strap or rope.

The action is as follows: When it is required to prevent the enginesracing, a strap or the like is run from the shaft of the engine to thepulley H of my apparatus, by which means the shaft G is driven. Thefixed disk J turns with the shaft, and being connected to the loose diskK by means of arms L, pivoted to the balls M, it also causes the saiddisk K to turn at the same time, and as speed is attained the balls Mfly outward, drawing the disk K inward on the shaft G, compressing thespring 0, and drawing out the piston of the small cylinder A by means ofthe forked end B of the piston-rod B, working in the groove K in thedisk K as the said disk K moves inward on the shaft, the spring 0preventing it going too far. As the piston-valve of the small cylindermoves it opens one of the outlet admission-passages to give motion tothe piston D of the large cylinder. One of these admission-passages isalways open to the condenser and the other to the atmospherealternately. WVhen the action takes place efficaciously, thethrottle-valve is closed and kept shut until the engine stops racing.When this takes place, the helical spring 0 moves backthe free disk Kand at the same time the piston-valve B of small cylinder A, and thuscuts off the vacuum from the top end of large cylinder and supplies thebottom end, so that there is a reaction which opens the throttle-valve.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I now declarethat What I claiin is 1.. An apparatus for governing narine engines toprevent them racing, consi ting of a large cylinder A and a smallcylindi i A with piston-valves B and D and inlet anc outlet pipes O andC respectively operated by neans of arms L and balls M, shaft G havingdisks J and K, the piston-valve of small cylinder A being operated byfork B working in the groove K of loose disk K, the whole being drivenby means of pulley H connected by strap, rope or the like to pulley ondriving shaft of engine substantially as shown and described.

2. In apparatus for preventing marine engines racing the employment of afork R having screwed end S adjusted by means of nut U or the like andbearing against connected disks P and P for compressing the spring 0 soregulating the movements of the balls M, and in connection withcylinders A and A with pistons and piston-valves-and pipes C and Ooperated by arms L and balls M and shaft G driven by pulley H connectedto driving-shaft of engine substantially as shown and described.

3. The apparatus for governing marine engines and to prevent themracing, consisting of cylinders A and A having pistons B and D, springsB, pipes C and O; the pistons being operated by the fork B disks K andJ, rods L, balls M, shaft G, driving-pulley H, spring 0, fork R, adjusting-nut U, disks P andP alloperating in the manner and for thepurposes substantially as shown and described.

Dated December Q7, 1895.

ALEXANDER WILSON.

\Vitnesses:

M10. 0. Rnnsn, ROBERT F. CoNLnY.

